BURST RESISTANT SAFE DEFLATION - Our exercise ball is safety guaranteed with the honey comb structure, so even if you accidentally pierce the yoga ball, you will never fall to the ground immediately. This structure means the air would be released little by little, therefore, this anti-burst and slow deflation design makes the stability ball so much safer. Anti Slip Material- The non-slip lines offer this equipment more friction, which means you can not only practice at home or in the gym, but also in places like outdoors or open spaces where the ground conditions are tougher. And rather than invest in a large, expensive gym machine, going for a smaller and more economical option like the fitness ball is much wiser! Use it to enhance your flexibility, facilitate your stretching, and maintain the stability during your practice of Yoga or Pilates! Excellent Quality Material Weight Capacity - Amazingly high weight capacity of 330 lbs. Professional GYM grade PVC: harmless to humans and pets alike, safely certified by SGS, BPA-free, latex-free and durable. Whether used as a pregnancy ball, a physio ball, a fun bouncy ball for your kids, or a professional ball for physical therapy, it would never fail you! Enjoy the soft and comfortably elastic texture as you press it down. Sitting Posture Correction Massage: This inflatable balance ball can be effectively served as a multifunctional Office Ball Chair. It constantly reminds you of a good sitting posture as your various body parts actively make subtle adjustments to stay in balance, which makes you automatically sit up nice and straight, increasing overall blood circulation. The soft PVC surface produces a massaging effect to alleviate your fatigue while working in front of the desk.